Hello @NjeriS ,
The "Brand Templates" option is not an available option anymore since it was particularly tied in with the retiring / phasing out 3rd-Generation Editor (3GE). The Cross Platform/Device Editor (CPE) has additional design elements to better brand your template from the start. This also includes setting up your own template for regular reusability as a master template, so you can copy directly from this source each time.
For additional resources on designing emails:
Creating emails
Creating emails from PDFs
Making good-looking templates
Best email length
Filling emails with engaging content
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